Vulnerability · Published Jan 12, 2026 · Assigned by GitHub_M
CVE-2026-22033Label Studio vulnerable to full account takeover by chaining Stored XSS + IDOR in User Profile via custom_hotkeys field
High 8.6
In plain English
A high-severity cross-site scripting in label-studio from HumanSignal. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 20% of all known vulnerabilities).
Official description
Label Studio is a multi-type data labeling and annotation tool. In 1.22.0 and earlier, a persistent stored cross-site scripting (XSS) vulnerability exists in the custom_hotkeys functionality of the application. An authenticated attacker (or one who can trick a user/administrator into updating their custom_hotkeys) can inject JavaScript code that executes in other users’ browsers when those users load any page using the templates/base.html template. Because the application exposes an API token endpoint (/api/current-user/token) to the browser and lacks robust CSRF protection on some API endpoints, the injected script may fetch the victim’s API token or call token reset endpoints — enabling full account takeover and unauthorized API access.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| PyPI | label-studio | no fix listed | GHSA-2mq9-hm29-8qch |
| PyPI | label-studio | no fix listed | PYSEC-2026-1502 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| HumanSignal | label-studio | <= 1.22.0 |
Weakness: CWE-79, CWE-284 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N